I have light brown eyes, my mom has blue eyes, husband has blue eyes, blue eyes run in his family what are the chances of our baby having blue eyes?

Brown is dominant: In gene expression so the baby is more likely to have brown eyes than blue. Blue is recessive.

50% per conception: If both your husband and mother have blue eyes and yours are brown, you are a carrier of a blue eye gene. Your brown gene dominates your blue, so yours are brown, but since dad can only donate a blue gene, your offspring will have 1 blue gene from him and either blue or brown from you. Your kids have equal chance of being blue or brown.